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Hepatitis C Myths and Facts
Myth #1
Everyone infected with hepatitis C will eventually die from hepatitis
C. Myth #2
Medical treatment is always difficult for the person with hepatitis C.
Myth #3
Hepatitis C is easily transmitted sexually.
Myth #4
Hepatitis C symptoms will not bother me if I take care of myself.
Myth #5
I
can cure hepatitis C by taking natural herbs and alternative
medications. Myth #6
A
man taking Interferon in combination with Ribavirin shouldn't worry
about impregnating a woman while on treatment.
Myth #7
There is no point in taking Interferon and Ribavirin if cirrhosis
(liver scarring) has already set in.
Myth #8
Everyone should be placed on Interferon for years and years, even if
they don't clear the virus.
For people who
tolerate the treatment reasonably well, some people believe that
treating hepatitis C with Interferon for periods of time beyond the
routine initial six to 12 month period, may be of benefit even if the
virus is suppressed, rather than cleared. It turns out that Interferon
appears to inhibit the formation of scar tissue in the liver and so
even in the fifty to eighty percent of people infected with the virus
who do not respond persistently to treatment, there may be some
rationale for long-term suppressive treatment with Interferon. This
question is being studied in a National Institutes of Health-sponsored
multi-center trial as well as being studied in drug company-sponsored
trials. Nevertheless, there are some physicians who advocate treating
everyone with suppressive Interferon therapy. As the risk of side
effects can accumulate over time it is certainly prudent to consider
long-term suppressive treatment. Optimally, this is done in the
context of a well-designed clinical trial during which side effects
are carefully monitored. People should be aware that the risks of
long-term suppressive treatment are still being analyzed.
Myth #9
Once the diagnosis of hepatitis C has been made, you need to put your
affairs in order and assume the worst.
Myth #10
Everyone with hepatitis C is depressed.
Conclusion Hepatitis C has been infecting millions of Americans for decades, but it is only within the last decade that routine tests have been available to help identify the millions who are infected and offer anti-viral therapy. Great strides have been made against this pernicious condition with persistent elimination with current treatments being achieved for many. For those who remain infected, there is a tremendous amount of hope as we develop a better understanding of lifestyle modifications and new treatments that may suppress or help clear the virus in the future. Even when liver failure ensues, the lifesaving option of liver transplantation is a reality for thousands of Americans due to the altruism of liver donors. Further advances are under development as the medical community rushes to serve the millions of Americans whose livers are under the attack of hepatitis C, and the future holds the promise of medicines that may cure a large portion of the population infected with this chronic virus
Research Articles or Interest:
EASL: 5 Year Followup of SVRs with PegIntron/RBV-98% Continued SVR5 - (05/15/06) DDW: The Effect of Liver Fibrosis and Cirrhosis on SVR in 4913 Patients With Hepatitis C: Results From The WIN-R Trial - (06/05/06) Tailoring antiviral therapy in hepatitis C - (04/21/06) Stanford Scientist to Discuss New Approach to Treating Hepatitis C Virus - (04/06/06) Review article: predicting response in hepatitis C virus therapy - (04/04/06)
CROI:
Pegasys Rapid Response at Week 4 in APRICOT Yields 75-82% SVR in
Genotype 1 Patients (02/21/06)
AASLD:
PREDICTING OUTCOME IN PATIENTS WITH HCV AFTER OLT: A 15-YEARS
FOLLOW-UP (11/14/05)
A special blood test must be done to find out if you have hepatitis C. We recommend an antibody test as the first step. If the antibody test is positive or if you are taking immune suppressive medications, you should also have a test for the virus itself. The test for the virus itself is called HCV RNA, PCR, branched-chain DNA, Amplicor and other names.
Ask your doctor:
When you're speaking to your doctor, remember that your alanine aminotransferase (ALT) level does not reflect the severity of hepatitis C or your viral load. Many people with chronic hepatitis C have normal ALT levels. You may need further testing to see how severe the inflammation is, even when ALT levels are not very high.
Can you have a "false positive" anti-HCV test result?
Can you have a "false negative" anti-HCV test result?
How long after exposure to HCV does it take to test positive for
anti-HCV?
How long after exposure to HCV does it take to test positive with
PCR?
HCR RNA TESTS
Viral Load
Unlike antibody tests, HCV RNA tests directly measure for the presence of the hepatitis C virus. HCV RNA tests may be qualitative or quantitative. Qualitative HCV RNA tests are used to diagnose hepatitis C. Your doctor might choose to perform an HCV RNA test instead of the ELISA, especially if you are at high-risk for hepatitis C. The HCV RNA test will be positive in as little as 1 to 2 weeks after exposure. A positive HCV RNA test means a person has hepatitis C infection. Quantitative HCV RNA tests allow your doctor to determine exactly how much virus is in the blood. This is referred to as the viral load. The viral load is usually expressed as units per milliliter or copies per milliliter. In patients with chronic hepatitis C infection, viral loads vary widely from 50,000 to 5 million copies per milliliter. A higher viral load may not necessarily be a sign of more severe or more advanced disease but it does correlate with likelihood to respond to treatment. HCV RNA tests can also be used to monitor response to hepatitis C treatment. For example, if the viral load decreases during treatment, this suggests that treatment is working and should be continued. Conversely, if the viral load remains the same, it suggests that the patient is not responding to treatment.
ALT Tests
The ALT test is a blood test that measures levels of alanine aminotransferase (ALT), a liver enzyme that is produced in higher amounts when the liver is inflamed. High ALT levels can be a sign of hepatitis C, but other conditions can also cause an increase in ALTs, including heart attacks, high triglyceride levels, and other forms of hepatitis. On the other hand, many people with hepatitis C have fluctuating or normal ALT levels, so a normal ALT test does not necessarily mean that hepatitis C infection can be ruled out.
ALTs are measured in routine blood tests so if your annual blood work results indicate high ALT levels, this may alert your doctor to do further tests to find out the cause.
A higher than normal ALT level does not necessarily mean more serious disease.
Genotype Testing
If you do test positive for hepatitis C, your doctor or the specialist to whom you've been referred will probably order a genotyping blood test.
The hepatitis C virus has at least six distinct forms, or genotypes
(labeled 1 through 6). In the
Liver Biopsy
Another common test used to classify hepatitis C is the liver biopsy, in which a small piece of liver is removed and examined under a microscope. Many doctors do a liver biopsy whenever a patient has a high alanine aminotransferase (ALT) level (which suggests that the liver is inflamed) to help them confirm what exactly is causing this problem and how serious it is. A liver biopsy can help your doctor or specialist determine how much damage has been done to the liver. When the liver is damaged (for example, by the hepatitis C virus), it tries to repair itself and forms small scars. This scar formation is called fibrosis. A greater amount of fibrosis indicates more severe and more advanced disease. Based on the results of the liver biopsy, you and your doctor will be able to make more informed decisions regarding treatment. For example, if you are found to have normal or only slightly higher than normal ALT levels and little or no fibrosis on liver biopsy, your doctor may decide to postpone treatment because this type of chronic hepatitis C has little chance of progressing to cirrhosis. On the other hand, if the degree of fibrosis is moderate to severe, your doctor may decide to begin treatment immediately.
Liver biopsy is done in the hospital and requires local anesthesia. You can also ask your doctor to give you something for pain before the procedure. We all recommended it here at Janis and Friends.
Your doctor has other tests available, too. Don't be afraid to ask what tests he or she has done, what other tests are available, and what the tests may tell you about your condition. Get all copies of your blood work before you leave the doctors office.
Hepatitis C is a viral infection of the liver which had been referred to as parenterally transmitted "non A, non B hepatitis" until identification of the causative agent in 1989. The discovery and characterization of the hepatitis C virus (HCV) led to the understanding of its primary role in post-transfusion hepatitis and its tendency to induce persistent infection. HCV is a major cause of acute hepatitis and chronic liver disease, including cirrhosis and liver cancer.
Globally, an estimated 170 million
persons are chronically infected with HCV and
No vaccine is currently available to prevent hepatitis C and treatment for chronic hepatitis C is too costly for most persons in developing countries to afford. Thus, from a global perspective, the greatest impact on hepatitis C disease burden will likely be achieved by focusing efforts on reducing the risk of HCV transmission from nosocomial 3exposures (e.g. blood transfusions, unsafe injection practices) and high-risk behaviours (e.g. injection drug use). Pathogen Hepatitis C virus (HCV) is one of the viruses (A, B, C, D, and E), which together account for the vast majority of cases of viral hepatitis. It is an enveloped RNA virus in the flaviviridae family which appears to have a narrow host range. Humans and chimpanzees are the only known species susceptible to infection, with both species developing similar disease. An important feature of the virus is the relative mutability of its genome, which in turn is probably related to the high propensity (80%) of inducing chronic infection. HCV is clustered into several distinct genotypes which may be important in determining the severity of the disease and the response to treatment. Clinical features of acute infection The incubation period of HCV infection before the onset of clinical symptoms ranges from 15 to 150 days. In acute infections, the most common symptoms are fatigue and jaundice; however, the majority of cases (between 60% and 70%), even those that develop chronic infection, are asymptomatic. Chronic infection and consequences About 80% of newly infected patients progress to develop chronic infection. Cirrhosis develops in about 10% to 20% of persons with chronic infection, and liver cancer develops in 1% to 5% of persons with chronic infection over a period of 20 to 30 years. Most patients suffering from liver cancer who do not have hepatitis B virus infection have evidence of HCV infection. The mechanisms by which HCV infection leads to liver cancer are still unclear. Hepatitis C also exacerbates the severity of underlying liver disease when it coexists with other hepatic conditions. In particular, liver disease progresses more rapidly among persons with alcoholic liver disease and HCV infection. Means of transmission HCV is spread primarily by direct contact with human blood. Transmission through blood transfusions that are not screened for HCV infection, through the reuse of inadequately sterilized needles, syringes or other medical equipment, or through needle-sharing among drug-users, is well documented. Sexual and perinatal transmission may also occur, although less frequently. Other modes of transmission such as social, cultural, and behavioural practices using percutaneous procedures (e.g. ear and body piercing, circumcision, tattooing) can occur if inadequately sterilized equipment is used. HCV is not spread by sneezing, hugging, coughing, food or water, sharing eating utensils, or casual contact. In both developed and developing countries, high risk groups include injecting drug users, recipients of unscreened blood, haemophiliacs, dialysis patients and persons with multiple sex partners who engage in unprotected sex. Please see 2002 CDC SEXUAL TRANSMISSION GUIDELINES FOR HEPATITIS A, B AND C In developed countries, it is estimated that 90% of persons with chronic HCV infection are current and former injecting drug users and those with a history of transfusion of unscreened blood or blood products. In many developing countries, where unscreened blood and blood products are still being used, the major means of transmission are unsterilized injection equipment and unscreened blood transfusions. In addition, people who use traditional scarification and circumcision practices are at risk if they use or re-use unsterilized tools. How is hepatitis C spread?
Who's at risk?
HCV
Mother-to-child transmission: HAART May Reduce HCV MTC; C-Section Did
Not Reduce MTC - (03/15/06) Is hepatitis C transmitted by
breast milk to infants? Can hepatitis C be transmitted
to other members of my family (household contacts)? Can a pregnant woman give
hepatitis C to her baby? Is hepatitis C transmitted by
insects? Can transmission of hepatitis C
be prevented by immune globulin? Prevalence
WHO estimates that about 170 million
people, 3% of the world’s population, are infected with HCV and are at
risk of developing liver cirrhosis and/or liver cancer. The prevalence
of HCV infection in some countries in
Table 1: Hepatitis C estimated prevalence and number infected by WHO Region
http://www.who.int/inf-fs/en/fact164.html
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Reviewed June 06 2006